Stool.



No. 659,089. Patented Oct. 2, I900 G. B. McKlNNEY.

S T 0 0 L (Application filed Feb. 8, 1900.)

(No Model.)

W/ TNE SSE S //v VENTOR A fr ms NORM! PEI'ERS cd. PHoTouryQ, 'msnmswu,n. c

UNITED STATES P TENT OFFICE.

GEORGE BESTER MCKINNEY, OF BARRY, ILLINOIS.

STQOL.

SPECIFICATION forming part of Letters Patent No. 659,089, dated October2, 1900.

Application filed February 3, 1900. serial Ho. 3,835. (No model.) I

To aZZ whom, it may concern: I

Be it known that I, GEORGE BEsTER Mo- KINNEY, a citizen of the UnitedStates, and a resident of Barry, in the county'of Pike and State ofIllinois, have invented a new and useful Improvement in Stools,'ofwliich the following is a full, clear, and exact description.

My invention relates particularly to an improvement in the constructionof dentists stools; and one purpose of the invention is to so constructthe stool that it will have .a yielding or spring action laterally inany di-' rection, the spring-section permitting said action being aportion of the standard or upright of the stool.

It is a further purpose of the invention to provide means whereby theseat of the stool may be conveniently and expeditiously raised andlowered and held firmly in adjusted position..

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in both figures.

Figure 1 is a perspective view of the improved stool, and Fig. 2 is alongitudinal central section through the stool.

The standard or upright A is tubular and is provided with a coil-springsection B of any desired length, which coil-spring section B is attachedto a suitable base 0 in any approved manner. As shown, the lower portion of the coil B extends over and is attached to a stud 10, extendingupward of the center of the base. The tubular or main section A of theupright or standard of the stool preferably enters the lower or springsection B at its upper end, and the upper portion of the spring-sectionof the standard may bev attached to the main section A, if desired; butthe main section A of the standard is provided, preferably, with anexterior collar 11, which rests upon the spring-section B.

The main section A of the standard of the stool is provided upon itsinner surface with teeth 12, in the form of a screw, the teeth beinginclined in an upward direction, as shown in Fig. 2, and usually theentire innersurface of themain section A of the stool-standard is thustoothed or threaded. The seat 'D is provided with a bottom. chamber 13,as is also best shown in Fig. 2, and a tubular stem 14 is screwed orotherwise fastened to the bottom central portion of the seat D, whichstem 14 is held to slide freely within the main portion A of thestandard of the stool and may extend within the spring-section B, ifdesired. Where the tubular stem connects with the seat of the stool ashoulder 15 is preferably formed, which in the lower position of theseat rests upon the upper end of the main section A of thestool-standard.

' Opposing longitudinal slots 16 are made in the lower end portion ofthe tubular stem of the seat D, and a latch 17 has-horizontal movementin the said tubular stem of the seat, being adapted to extend. within orout through either of the slots 16, as shown in Fig. 2. This latch isprovided at one of its side edges with teeth 18, adapted to lit. theteeth 12 in the main tubular section A of the standard of the stool, andthe said latch 17 is also provided in each side with an inclined ordiagonal slot 19, extending in direction of its upper and lower edges.The latch is manipulated through the medium of a rod 20, the lower end21 whereof is flattened and passes through a slot made centrally andvertically in the latch, and the said flattened surface 21 ofthe rod 20is provided with pins 22, which extend through the diagonal slots 19 inthe latch. Thus when the rod 20 is drawn upward the pins 22 are made totravel upward also, and the toothed edge of the latch is then carriedout of engagement with the teeth on the standard of the stool, and thestem connected with the seat may be raised or lowered, as desired.

The rod 20 may be manipulated in difierent Ways; but preferably it iscontrolled as shown in Fig. 2, wherein a springarm 23 is located in thechamber 13. in the bottom of the seat of the stool, and one end 24ofthis arm is attached to the bottom portion of the stool, while the otherend extends out through an opening 26, made also in the bottom of theseat of the stool, and the outer end of the arm 23 usually terminates ina button 25.

' The rod :20 has a hinge connection with the central portion of thespring-arm 23.

It will be observed that owing to the coilsection in the standard of thestool the said standard may be inclined laterally in any y directionthat. may be found advantageousto the occupant of the stool and that thestool may be quickly and conveniently adjusted as to height.Furthermore, the entire construction of the stool is not only durable,but simple, and the stool is in no manner rendered unsightly by theimprovement.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A stool comprising a base having astud extendingupward therefrom, a seat, a standard having a laterally-yielding lowercoil- Spring section extending over the stud on the base and a rigidupper sect-ion fitting within the coil-spring section, substantially asdescribed.

2. A stool comprising a base, a standard mounted on the base and havingacoil-spring section and a tubular rigid section fitting one within theother and a seat provided with a post having sliding movement in thestandard, substantially as described.

A stool comprising a base, a standard or upright having a lowercoil-spring section attached to the base, and an upper rigid tubularsection adapted to enter the upper end of the coil-spring section, thesaid upper section being provided neat-its lower end with an externalcollar adapted to rest on the upper end of the coil-spring section, anda seat provided with a stem fitting within the said standard,substantialh as described.

I. In a stool, a base having a stud extending upward therefrom, astandard comprising a tubular rigid section, and a coil-spring sectionextending over and attached to the said stud on the base,the tubularrigid section having interiorly-located teeth, a seat having a chamberin its lower portion extending from side to side, a post for the seathaving sliding movement in the standard, a latch having teeth arrangedfor engagement with the teeth in the standard, an arm located in thechamberof the seat and secured at one end to the bottom of the seat, theother end of said arm extending out through an opening in the bottom ofthe seat and a rod connecting said arm with the said latclt,suhstantially as described.

5. In a stool, a base, a standard comprising a tubular rigid section,and a coil-spring section, the tubular rigid section havinginteriorly-located teeth, a seat having a bottom chamber, a hollow postfor the seat having sliding movement in the standard, the said posthaving opposing slots, a latch having horizontal movement in the saidpost and adapted to extend within the post or out through either of theslots, the said latch being provided atone of its side edges with teethadapted to [it the teeth of the standard, the said latch being alsoprovided in each side with a diagonally-arranged slot extending indirection of its upper and lower edges, a rod having a flattened lowerend extending through a central vertical slot in the latch, the saidflattened surface being provided with pins extending through thediagonal slots in the latch, a spring-arm located in the chamber in thebottom of the seatand secured at one end to the seat, the other end ofsaid arm ext-ending out through an opening formed in the bottom of theseat, the upper end of the said rod having a hinge connection with thecentral portion of the spring-arm, for the purpose set forth.

6. A stool comprising a base, a tubular standard having alaterally-yielding section mounted on said base, a rigid section,fitting within the laterally-yielding section, and a seat provided witha post adjustably held in the said standard, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE BESTER MCKINNEY.

Witnesses:

A. L. JONES, WM. HAZEN.

